Inflence of supplemental choline on milk yield, fatty acid profie, and postpartum weight changes in suckling ewes

H.A. LEE-RANGEL; GERMÁN DAVID MENDOZA-MARTÍNEZ; J. A. MARTINEZ; A. E. RELLING; M. OVIEDO; A. VAZQUEZ-VALLADOLID; M.M. CROSBY

Pittsburgh

Congreso; 2017 American Dairy Science Association® Annual Meeting; 2017

nge-newline">The objectives of the study were to evaluate the effect of supplementingrumen protected choline (RPC, Reashure; Excential RumenPass, CH)and a vegetal Biocholine (Indian Herbs) on BW, milk production andfatty acids composition in suckling ewes and their lambs. The basaldiet contained 34% sorghum stover, 16% whole corn grain, 11% oatgrain, 14% sorghum grain, 12% soybean meal, 9% cane molasses andminerals. Rambouillet ewes (n = 24, initial BW 67.2 ± 1.7 kg), housedin individual metabolic cages from d 30 before to d 30 after parturition, were assigned to one of the experimental treatments accordingto a completely randomized design. Treatments were control withoutcholine (CO), 4 g/d RPC (T1) and 4 g/d Biocholine (T2). Ewes wereassigned. Ewes and lambs were weighted at d 1 (lambing) and d 30.Milk yield was measured and sampled on d 30 for milk compositionand FA analysis. Data were analyzed using the PROC MIXED. Therewere treatment effects (P < 0.05) at lambing and at d 30 of lactation onewe?s BW (d1: CO, 60.3; T1, 63.4; T2, 77.7 ± 1.73 kg; and d 30: CO,60.0; T1, 62.0; T2, 70.1 ± 1.77 kg), lamb birth weight (CO, 4.7b, T1,5.7a; T2, 5.8a ± 0.08 kg) and lamb?s BW at d 30 of age (CO, 11.4b; T1,13.9a; T2, 13.6a ± 0.15 kg). Milk yield increased (P < 0.05) by effectof choline supplementation (CO, 1.02b; T1, 1.39a; T2, 1.57a ± 0.03kg/d), as well as the oleic acid content in milk (CO, 29.4b; T1, 30.7ab;T2, 34.1a ± 1.14%). However, there were no differences (P > 0.05) onmajor milk components (protein, lactose, fat, non-fat solids and totalmilk solids). From these data, we conclude that Biocholine at this doseinduced large bodyweight gain during gestation, with moderate effectson lambs? birthweight. This point needs further investigations.